Mon Mar 29  2004	by Seiya Nishizawa
	releas narray_miss-1.0.3
	add NArrayMiss#_dump NArrayMiss._load
	add NArray#_dump NArray._load
	bugfix for NArrayMiss.to_nam
	bugfix for NArrayMiss#transpose

Thu Mar 02  2004	by Seiya Nishizawa
	releas narray_miss-1.0.2
	change to return NArrayMiss insted of Numeric when length==1 in [+,-,*,/, etc]
	bugfix for NArrayMiss[]
	bugfix for NArrayMiss#[]
	add option "min_count" to mean
-
Mon Oct 06  2003	by Seiya Nishizawa
	releas narray_miss-1.0.1
	change NMMath and include to NArrayMiss class then x.sin is same as NMMath::sin(x)
	add argument to eval for message at exception
	change format of inspect to show "-" for invalid data
	bugfix for NMMath::atan2
	
Mon Sep 01  2003        by Seiya Nishizawa
	releas narray_miss-1.0.0
	enable for validation and invalidation to get Array and index for argument
	make MArrayMiss#[index] = nil|false to set invalide
	several methods to return scalar if length==1 && valid
	bugfix for set mask
	bugfix for NArrayMiss#stddev
	
Thu Mar 03  2003	by Seiya Nishizawa
	releas narray_miss-0.5
	change for NArrayMiss.***(1,n) {+,-,*,/,...} NArrayMiss.***(m,1) to return NArrayMiss with shape [m,n] 
	change for NArrayMiss#indgen[!] to validate
	bugfix that NArrayMiss#to_na(missing_value) did not set	missing_value
	bugfix that NArrayMiss#validation and NArrayMiss#invalidation was switched
	buffix that NArrayMiss#stddev with no argument returned error
Mon Feb	24  2003	by Seiya Nishizawa
	releas narray_miss-0.4
	new methods "size", "length", "all_valid", "all_invalid" and
		"set_without_validation"
	rename methods "set_missing" -> "validation" ,
		"set_unmissing" -> "invalidation"
	change "[]=" method to make elements valid
	change "to_na" method to have argument of missing_value

Thu Feb 20  2003	by Seiya Nishizawa
	releas narray_miss-0.3
	bugfix for "sum" method
	bugfix for "set_missing_value" method
	change document

Sat Feb 01  2003	by Seiya Nishizawa
	releas narray_miss-0.2
	adding "min_count" option for sum,accum,min,max,mean and stddev	methods
	new method to_type
	change document

Thu Jan 30  2003	by Seiya Nishizawa
	first release narray_miss-0.1
